Pump plunger



J. A. ZUBLlN PUMP PLUNGER June 21 ,v 1927.

Filed Nov. l1. 1924 F Z wff/ /z /6/ l 3 .N l L3 H3 5 5` Z0 32234 Z2%.255 H@ 75 Z /ww l pump.

Patented June 2l, 1927.

'UNIT-ED JOHN n. ZUBLIN, oFjLos ANGELES, CALIFORNIA.

PUMP -rLUNente Application ilcd November 11, 1924. Serial No. 749,132.

This invention 4relates to reciprocating pumps, and it f relatesparticularly Y jto Y those types of pumps employingcup attachments lcomprises a barrel carried on lthe tubing and '-f situated at the bottomof the well in which 'barrel a plunger is Y reciprocated. The plungermay comprise` a body lnember to which cups` are secured, these cupsbeing secured either 'at the `'top or the bottom of the plunger or atboth ends, the purpose of these vcups being to-prevent leakage aroundthe plunger. A pronounced .disadvantage of the VVpresent types ofplunger using cup attachments is that' the upper cup member carries 'theentire weight of thehead of oil in the well. vThi'sfn'ieans that the4pressure there'against causes considerable 'frictionlbetween this uppercup and the barrel ofthe pump and `results in a rapid wearing away "fofboth plunger and barrel. `Another disadvantage is that a cupsituatedfat. the

Vupper endiof avplunfgeriis exposed and any sand or silt gravitatin'gwill collect andv pack under pressure im the cupwmember causing itto'bind and rapidly wear away. In other words, inthe-present types ofreciprocating plunger employing cups, the cups are inno The use of-cupson the.

way protected. l lower` endvof a plunger 1s dlsadvantageous inasmuch aswhen the plunger is'hfted 4from plunger is moved out of `the barrel, theoil thereabove will rush into the space in ithe pump barrel createdfbythe removing ofgthe plunger. The oil rushing into the barrel lat "aterriiiic speed catches the lower c up members'of the plunger andcausesaninstan taneous destructionthereto n n It is an object lof thisinvention to lprovide a plunger having a cup attachment.. -\vl1ichis'superiorto-the other plungers of thistype inasmuch as the novelarrangement vthereof lengthens fthe vlifeof the cup;mem-

bers and Vincreases f the efficiency 'of the It is also an objectof thisinventioruto A"provide a plunger of this type having acup attachmentwhich is protected :.agafinstex- `cessiye pressures4 and strains. .and:protected V'froinsand "Iaecomplish this by'fdisposing the line 4-#4 ofFigi.

of the cu-p `attachment between upper .and lower :protective means. Y i

.It is a further object ofthe inventiony to lprovide in a plunger ofthis character a unique construction of cup `attachment `whichfacilitates its disposal in the manner mentioned.

Other objects and'advantages of the Yin- Vention will be made evidenthereinafter.

Referring tothe drawings which are for illustrative' purposes only,

Fig. l is a Vertical sectional View through a pump embodying thefeaturesof my invention, the plunger of -this lpump being broken and contractedin Variousplacesin a manner to showthe essentials thereof.

Fig'. 2 is a section taken :as indicated `by the line 22 of Fig. 1.1

i Fig. ,.3 is .a l'section taken as indicated `by ithe line 3*-3 of Fig. l.

Fig. 4 isa` fragmentary ysection taken on In the f-orm of my hinventionshown in the drawings, Ifprovide .a pump barrel 11 which is suspended ontubing in-,a well in which -pump `barrel l1 a pump vplunger l2 `.isreciprocableyThe pu-mp plunger l2 comprises an upper Iplunger memberv`13 and a `lower plunger -menfber .14 between `which upper and' lower'plunger members a cup attachment l5 f1s connected. -The. upper *plungermember l2 comprisesan attachment `member 117 having pin 1,8;to whichrthe lower socket `19: of a sucker rod string may Vbesecured.VAfplungerbody 21 isconnected the barrel of the pump, 'as the body ofthe to theilower'end ofthejbody 1,7 by means of a threaded :projection22 ywhich screws into plunger body 21 .is alnipple 25 which threads'tint-o lthe :chamber 26 ofL thejbody` 2l, as in-y dicated-atfQT f Thenipple 25 has apassage 1284 therethrough which` is :arrangedto beclosedbyaball .24 infthe chamber 26 and vresting. againsttheseat-29provided by. the

.upper'fendofwthenipple-. Onthe .cylindricalfportion Stof thel nipple 25is placed a base :portion 32o-flan upper plunger .sleeve B3. .isleevefjsof ,such a:size asftoengage'fthe .inner wall ofrthe .barrel v llhaving afluid- :tightirel'atonship therewith. y,

The externalfdiameter of theplunger )i y{hrthethreaded.projection-B6 ofthe nip- .ple' Qis screwed atubular body portion 137 of 'the' dupattachment 15, this tubular body nio 37 having a head 38into which thethreaded projection 36 is extended. The upper face 39 of the head 38Vengages with the lower face of the base 32 of the upper plunger` sleeve33., clamping it securely in place against the shoulder provided by thelower end of the body 21. `Against an annular' shoulder 40 of thetubular body 37 a cup 41 placed, and alternately thereafter spacer of alip 47 of an adjacent cup 40. `A lower shoulder 48 of each of thespacers 42 is are ranged to engage with the upper face of the lip 47 ofan adjacent cup 40, this serving to clamp `the cups 40 between the upperace and the `lower shoulder of the spacer members. Gnthe lower end ofthetubular portion 43 ofthe body 37 is secured a nut 50,

this nut having arecess 51 into which the lower end 52 of the tubularportion 43 is threadably secured; When the nut 50`is in place, it'servesas a means for clamping the cups and spacers in'their pro er positions.

On the lower threaded projection 53 of `the nut there is screwed aflexible joint body54, this body 54 having a recess 55 into which theprojection 53 extends. A securing pin 56 extends through an opening 57provided in the lower portion 58 of the body 54,

this pin` 56 having a T head 59 which eng i gages with the upper face 60of the portion 58. The body 54has an Vopening 61fwhich connect-s throughan opening 62 in the nut 50 with a central passage 63 ofthe tubular body37, Vthis passage. 63 in turn connecting with the opening `28 in thenipple 25.` The shaft portion 64 of thepin 56 threadsinto an opening `65situated in the upper end of a lower plunger member body 66. lowerplunger member body 66 is of the same construction as the upper plungerbody 21 having' a chamber 67 into which the upper threaded end 68 of alower nipple 69 is threaded. Aball 7 0 is arranged, as shown, to rest onthe upper face 71 of the nipple 69 in a manner to close the passage 72therethrough. A lower'nut 73 is secured on the lower end 74 ofthe nipple69,` this lower nut 73 having a recess 75 into which the portion 74 ofthe nipple 69 threads. The nut 73 serves asV a means for securing a`lower plunger sleeve 77 in place, i this 'plunger j sleeve 77 having abase 78 which'is clamped between the" lower face 79 of the lower plunger`bodyf`66`and the upper faceV 80 `of the 73. Extending upwardly from thebase `This- 78 is a sleeve portion 82, the outer face of this lowerplunger vsleeve being of such a size as to contact with the inner faceof the barrel 1l having luidtight engagement therewith. This plunger 12is arranged to Vbe reciprocated in the barrel 11 through a string of'sucker rods which extends from the surface of the well.

During the downward travel of the plunger 11, theballs 24 and 70 areremoved from their seats and oil is allowed to flow upwardly into andabove the plunger, this oil passing'through the opening 72 in the lowernipple 69, through the chamber 67 into the interior of the lower plungersleeve 77 and through the opening in the flexible VEl() joint body 54.It then passes through the openings 62, 63 and 28 past theball 24 andintothe chamber 26 of the body 2l. The

oil passes from the chamber 28 to the intef The weight of the `oiliscarriedentirely if by the upper and lower sleeve members'as` long as afluidtight relationship between the sleeve members and the barrelexists. When a slight leakage occurs in the upper plunger sleeve 33, thecup `attachment 15 is called-7 upon to prevent.` leakage of the'pump andeven under these circumstances, the wei ht thereon will be very small.Any sand which gravitates from the oil collects entirely in the sleevemembers 33 and 77, and not in the cups 41. This is `because of the` factthat the cups 41 are not indirect contact with the oil flowing throughthe plunger.

From the drawings `and description, it

`will belseen thatin theconstruction shown, the cup attachment 15iscprotected entirely against strains and from sand by the upper member12.1The lower plunger plunder member 14 serves as a protection for thefcup attachment 15 when the plunger is being removed from the barrel 1l.In pumps having cup attachments, but not having a lowermember as does myinvention, the `oil above the plunger will rush violently into thebarrel d as the body portion of the plunger moves from the barrel. Oilrushing into the barrel` cat-ches. the cups in a manner to immediatelydamage them and unfit themfor future use. In my construction when theplunger is removed" from the barrel,ithe inrush of oilwill notoccuruntil the lower plunger member 14 moves from the barrel 11. The cu`attachment l5 is at this time a considera le distance above the barreland will not be` al'ected'byl the rushing of theoil into the spaceA inthe member created `by` the removing of the plunger.

Practical experience` has proven 'that theV same kind of cups whichpreviously lasted for a period of about two weeks in the old l Ui) typesof pump ma be used four times as long in a plunger o my invention. i

It is plainly obvious from the drawing that the lower plunger section isflexibly or hingedly connected to the cup attachment in such a mannerthat it may adjust itself laterally in the pump barrel, butindependently of the cup attachment.A There is, however, no' relativeaxial movement between the cup attachment and the pump shaft. It ishighly desirable to have this lateral adjustment so that the cupattachment and the plunger section can individually align themselves inthe pump barrel, since the pump barrel is sometimes crooked.

I claim as my invention:

l. A reciprocating pump comprisingza pump barrel; and a plungerreciprocable in said barrel, said plunger consisting of a sectionhavinga plunger sleeve and means secured to said section for providing afluidtight relationship between said barrel and said plunger so that itis only laterally adjustable relative to said means. I

2. A reciprocating pump comprising: a pump barrel; and a plungerreciprocable in said Abarrel consisting of an upper' section, a lowersection, and means connected between said sections and flexiblyconnected to one of said sections for contacting said barrel so as toprovide a iluidtight relationship therebetween.

3. A reciprocating pump comprising: a pump barrel; and a plungerreciprocable in said barrel consisting of a section havingl a plungersleeve and a cup attachment flexibly secured to said section, both saidsection and said cup attachment being adapted to have engagement withsaid pump barrel.

'-1. A reciprocating pump comprising: a pump barrel; apump plungerreciprocable in said barrel consisting of an upper plunger member; meansrigidly secured to said 'upper plunger member for wiping said barrelwhen said plunger reciprocates and a lower plunger member flexiblysecured below said means.

5. A reciprocating pump comprising: a pump barrel; and a plungerreciprocable in said barrel consisting of cup members engaging saidbarrel, upper protecting means arranged above said cup members, andlower protecting means having a sleeve lieX- ibly arranged below saidcup members so as to be laterally adjustable relative to said cupmembers.

6. A reciprocating pump comprising: a pump barrel; and a plungerreciprocable in said barrel consisting of an upper plunger member, alower plunger member and means said barrel consisting; of an upperplunger member, a cup attachment rigidly secured to the lower end oisaid upper plunger member; and a lower plunger flexibly secured to thelower end of said cup attachment.

8. A pump as set forth in claim 7 in which said cup attachmentcomprises: a tubular body; cup members arranged on said tubular body;and spacer members arranged on said body for spacing said cup members.

9. In a reciprocating pump of the class described, the combination of aplunger comprising: an upper plunger member; a lower plunger member; atubular body rigidly secured to one of said plunger members and flexiblysecured to the other' of said plunger members; cup members carried bysaid tubular body; and spacer members arranged on said tubular ybody forspacing said cup members.

10. In a reciprocating pump of the class described, the combination of ayplunger comprising: an upper plunge-r memberga tubular -body rigidlysecured to said upper plunger member; cup `members carried by saidtubular body; spacer members arranged on said tubular body for spacingsaidcup members; a lower' plunger member; and means for flexiblysecuring said lower plunger member to said tubular body.

In testimony whereof, I have hereunto set my hand at Los Angeles,California, this 5th day of November, 1924.

JOHN A. ZUBLIN.

